Nice list. Some tools have a lot of feature overlap which make enrichment much easier. I’m in Censys, Validin, and Hunt.io (didn’t see mentioned) almost daily. I need to familiarize myself with using BGP tables more though.
https://github.com/curated-intel/Attribution-to-IP
GitHub - curated-intel/Attribution-to-IP: A collection of methods to learn who the owner of an IP address is.

A collection of methods to learn who the owner of an IP address is. - curated-intel/Attribution-to-IP

GitHub